Signal detection device and signal detection method

Abstract

A signal detection device according to an aspect of the invention includes a laminated structure of a first circuit layer (201) in which a plurality of electrodes brought into contact with a subject is formed, a second circuit layer (202) in which a plurality of amplifiers having an input portion capacitively coupled to the plurality of electrodes, respectively, is formed, and a third circuit layer (203) in which a plurality of transistors for reading outputs of the plurality of amplifiers is formed, an insulation layer which seals the second circuit layer is formed between the plurality of electrodes formed in the first circuit layer and the second circuit layer, and the plurality of electrodes and the input portions of the plurality of amplifiers are capacitively coupled to each other via the insulation layer.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a signal detection device and a signal detection method for detecting a signal.[0003]Priority is claimed on Japanese Patent Application No. 2012-220427, filed on Oct. 2, 2012, the content of which is incorporated herein by reference.[0004]2. Description of Related Art[0005]Hitherto, signal detection devices such as electrocardiographs and electroencephalographs have been known as devices for detecting a biosignal (PTL 1). Usually, in these types of signal detection devices, a differential amplifier amplifies a difference between signals of a pair of electrodes mounted on an organism which is a subject. By taking the difference between the signals, noise components having the same phase, which are included in the respective signals, are canceled and a detection signal having a high signal to noise ratio is obtained.CITATION LISTPatent Literature[0006][PTL 1] Japanese Unexamined Patent App...

AI Technical Summary

Benefits of technology

[0020]According to an aspect of the invention, since the electrode and the amplifier are formed integrally with each other, the signal to noise ratio of a detection signal can be improved. According to an aspect of the invention, since the electrode and the input portion of the amplifier are capacitively connected to each other, the amplifier can be sealed when view...

Problems solved by technology

However, according to the above-described prior art, the electrodes and the differential amplifier are connected through wiring cables, and thus noise may be mixed on the wiring cables and there is a limit on the improvement of the signal to noise ratio of the detection signal.

In addition, even when the electrodes and the differential amplifier are formed integrally with each other, there is a concern that the environment in a living body may cause a failure or malfunction of an electronic circuit of the amplifier when the electrodes and the...

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